Expandable, blowing agent-containing pellets based on high temperature thermoplastics having a glass transition temperature according to ISO 11357-2-1999 of at least 180 C., wherein the expandable, blowing agent-containing pellets comprise at least one nucleating agent and have a poured density according to DIN ISO 697:1982 in the range from 400 to 900 kg/m.sup.3 and a mass in the range from 1 to 5 mg/pellet, processes for production thereof and foam particles obtainable therefrom having a glass transition temperature according to ISO 11357-2-1999 of at least 180 C., wherein the expanded foam particles comprise at least one nucleating agent and have a poured density according to DIN ISO 697:1982 in the range from 10 to 200 kg/m.sup.3, and particle foams obtainable therefrom and the use thereof for producing components for aviation.

The invention relates to a metering pump having a hydraulic drive (12) for supplying a hydraulic fluid under pressure. The metering pump furthermore comprises a housing (2) and an oscillating piston (3), which is accommodated in the housing (2) in such a way that at least a first and a second hydraulic chamber (9-1, 9-2) and a first (6-1) and a second delivery chamber (6-2) are formed, wherein the oscillating piston (3) has at least a first driving surface (10-1) in the first hydraulic chamber (9-1) and at least a second driving surface (10-2) in the second hydraulic chamber (9-2), and the hydraulic chambers (9-1, 9-2) communicate with the hydraulic drive, thus enabling the oscillating piston (3) to be moved backward and forward between a first and a second position by the hydraulic fluid, wherein, during the movement from the first to the second position, the volume of the first delivery chamber (6-1) is enlarged and the volume of the second delivery chamber (6-2) is reduced and, during the movement from the second to the first position, the volume of the second delivery chamber (6-2) is enlarged and the volume of the first delivery chamber (6-1) is reduced. The invention furthermore relates to a metering system for mixing two fluids and a metering system for metering at least one fluid.

A device for producing a dyed plastic melt and an undyed plastic melt includes a multi-shaft screw extruder, a first metering installation, a second metering installation, and a control installation for selecting between a first operating mode for producing the dyed plastic melt and a second operating mode for producing the undyed plastic melt. The first metering installation serves for feeding an undyed plastic material through a first infeed opening into a housing of the multi-shaft screw extruder, and the second metering installation serves for feeding at least one dyeing agent through a second infeed opening into the housing. In order for the undyed plastic melt to be produced, the plastic material is fed exclusively via the first infeed opening such that residual dyeing agent which is still located in the second metering installation or in the region of the second infeed opening does not contaminate the undyed plastic melt.

A supplying apparatus and a supplying method of granular material in which granular material is supplied to a measuring container provided on a lower side so as to reach a target measurement value which is determined in advance. The supplying apparatus includes a storage container storing granular material, a valve body provided in the storage container so as to be opened when granular material is supplied, and a control section controlling open and close operations of the valve body. The control section keeps the valve body at an open position until a detection value of a detecting section of the measuring container becomes a predetermined value smaller than the target measurement value when the target measurement value exceeds a threshold value which is determined in advance. The control section opens the valve body in a pulsed way until the detection value of the detecting section becomes the target measurement value when the target measurement value is under the threshold value.

Provided is a material supply device that supplies a material to a plasticizing unit, the plasticizing unit being configured to plasticize the material to generate a plasticized material, the material supply device including: a housing having an inlet through which the material is fed into the plasticizing unit, and accommodating the material; and a rotary member provided above the inlet in the housing and configured to rotate around a rotation shaft intersecting a vertical direction. The material is accommodated above the rotary member in the housing, and the material is intermittently supplied to the inlet by the rotation of the rotary member.

A method for processing pharmaceutical powders, which comprises providing a feeder module including a plurality of feeder units each with a storage hopper, a weighing cell, a conveyer, and a discharge end, connecting the storage hopper to a refilling system with a refilling valve, connecting the refilling valve to a level or weight indicator disposed above the refilling valve, connecting the discharge end to a common receiving container, refilling the storage hopper with a powder intermittently 40 to 80 times per hour, storing data during refilling, transporting powder from the storage hopper with the respective conveyer, and discharging powder from each feeder unit into the common receiving container. During each refilling of the storage hopper, the refilling valve dispenses powder into the storage hopper and, during the step of transporting the powder from the storage hopper, the conveyer is operated according to the data collected during previous refills.

A method for producing a stabilizer composition for a polymer and a stabilizer composition produced by the method. At least one carboxylic acid is reacted with at least one metal compound, such as at least one metal hydroxide and/or at least one metal oxide and/or at least one metal carbonate, thereby forming a metal carboxylate of the carboxylic acid. The reaction of the carboxylic acid with the metal compound is carried out in a continuous manner in an extruder while reaction water being formed is discharged out of the extruder.

A method and an apparatus manufactures and tests workpieces. The apparatus is mountable on or includes a system for mixing or melting materials. The apparatus includes application units and a replacement system that is designed to automatically replace application units in respect of the position or function thereof.

A method of forming a fiber-reinforced molding compound. The method includes establishing a melt stream of a source material including a first polymeric material having a first melt temperature in an extruder and dosing a composite material into the melt stream. The composite material includes pre-impregnated reinforcing fibers comprising reinforcing filaments and a second polymeric material having a second melt temperature greater than the first melt temperature. The composite material has at least 30% of the reinforcing filaments protected by the polymeric material such that the polymeric material surrounds each filament completely forming a barrier between it and an adjacent filament in the at least 30% of the filaments. The temperature of the melt stream at dosing is below the second melt temperature. The method includes forming a molding compound from the source and composite materials. The method includes dispensing the molding compound to produce a part.

The module (19) for a conveyor system for bulk goods has at least one first tubular section (20). A second tubular section (23), which is provided with at least one coupling piece (21), branches away from said first tubular section. The second tubular section (23) adjoins a valve (13) which has three connections (25, 26). The first connection forms a flow-connection with the second tubular section (23). The second connection (26) of the valve (13) can be selectively connected to the first connection (25) by means of a first line and to the third connection (25) by means of a second line (48).